a variant of hoity-toity;apparently sometimes associated in idea with high, height, or with tight, and modified in use accordingly;the pronunciation of oi as i, as in ile, bile = oil, boil, was formerly prevalent

a 1700 - A New Dictionary of the Terms Ancient and Modem of the Canting Crew, B.E.;"Hightetity, a Ramp or Rude Girl"

From: Vanity FairA Novel Without a HeroBy William Makepeace Thackery, 1849Chapter XVIII. Who Played on the Piano Captain Dobbin Bought?P. 156